Khloe won't be a part of the 2013 show - the Kardashian sister has reportedly been fired from 'X Factor'.

The 'Keeping Up With The Kardashians' star joined Simon Cowell's US show last year as a co-presenter with Mario Lopez and while he is set to return next season, Khloe will not be back.

A source told the New York Post: ''They are asking Mario [Lopez] to come back, but not Khloe.''

Khloe previously revealed she was asked not to take any hosting lessons before she started, leaving her unprepared for what to expect.

She added: ''I've never done live TV before, and I was asked to not do any hosting lessons because they wanted me to be just myself. I found the day before because the stage was just built, that I couldn't read the teleprompter without glasses, so I had to get contacts the day before.

''Just learning how there's a screaming audience and you don't yell because the mic is right there ... I will have an earpiece in my ear, and while I'm trying to read the teleprompter then I have someone counting down ... and they're like, 'Okay, ask Simon this or that' ... There were so just so many pieces I never knew were involved in live TV.

''I do feel like through every show I got better and better, but my first week I literally was like, 'I am going to die. I want to fake a heart attack.'''